Lpc2000

I have a cheap Wriggler clone and evaluation board from Web7days. I
(now) know that by paying a little bit more I could have got much
better, and I will be getting some better tools.

But, today I got back to ny LPC project and as the Web7days kit is all
I have at the moment I resumed work with that. I get a lot of problems
with the jtag I/F, and reasoned that it ain't that
complicated....let's fix it. Armed with Leon Hellers scheme in the
file section I found the problem in 2s flat.....pins 1 and 2 of the
jtag connector on the evaluation board were connected together but to
nothing else....the '244 on the wriggler had Vcc at 2V courtesy of the
protection diodes.

And this is the MKII version of the board!

You get what you pay for.....I saved perhaps $30 by going to Web7days,
the worse "saving" I have ever made in my life!

Hi,

> I have a cheap Wriggler clone and evaluation board from Web7days. I
> (now) know that by paying a little bit more I could have got 
> much better, and I will be getting some better tools.
> 
> But, today I got back to ny LPC project and as the Web7days 
> kit is all I have at the moment I resumed work with that. I 
> get a lot of problems with the jtag I/F, and reasoned that it 
> ain't that complicated....let's fix it. Armed with Leon 
> Hellers scheme in the file section I found the problem in 2s 
> flat.....pins 1 and 2 of the jtag connector on the evaluation 
> board were connected together but to nothing else....the '244 
> on the wriggler had Vcc at 2V courtesy of the protection diodes.
> 
> And this is the MKII version of the board!
> 
> You get what you pay for.....I saved perhaps $30 by going to 
> Web7days, the worse "saving" I have ever made in my life!

Best advice is that if you want a cheap LPC board, the Olimex kit is
pretty hard to beat.  Every board we've received here works without
problem.

With Olimex you don't pay over the odds, you get a clean piece of
hardware, and it *does* work.  Not only that, but Tsvetan is a great guy
if you're having minor problems with your boards.  Each time I've asked
about a suspected hardware fault, it's always been my problem, and not
the boards.

--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
CrossWorks for MSP430, ARM, and (soon) Atmel AVR processors

----- Original Message ----- 

From: "hodgejackiehank" <hodgejackiehank@...>
To: <lpc2000@yahoogroups.com>
Sent: Thursday, June 24, 2004 9:45 AM
Subject: [lpc2000] Speechless


> I have a cheap Wriggler clone and evaluation board from Web7days. I
> (now) know that by paying a little bit more I could have got much
> better, and I will be getting some better tools.
>
> But, today I got back to ny LPC project and as the Web7days kit is all
> I have at the moment I resumed work with that. I get a lot of problems
> with the jtag I/F, and reasoned that it ain't that
> complicated....let's fix it. Armed with Leon Hellers scheme in the
> file section I found the problem in 2s flat.....pins 1 and 2 of the
> jtag connector on the evaluation board were connected together but to
> nothing else....the '244 on the wriggler had Vcc at 2V courtesy of the
> protection diodes.

I'm glad my schematic helped. Was the track from pins 1 and 2 of the JTAG
connector actually missing? I find that hard to believe.

Leon

--- In lpc2000@yahoogroups.com, "Leon Heller" <leon_heller@h...> wrote:
> ----- Original Message ----- 
> From: "hodgejackiehank" <hodgejackiehank@y...>
> To: <lpc2000@yahoogroups.com>
> Sent: Thursday, June 24, 2004 9:45 AM
> Subject: [lpc2000] Speechless
> 
> 
> > I have a cheap Wriggler clone and evaluation board from Web7days. I
> > (now) know that by paying a little bit more I could have got much
> > better, and I will be getting some better tools.
> >
> > But, today I got back to ny LPC project and as the Web7days kit is all
> > I have at the moment I resumed work with that. I get a lot of problems
> > with the jtag I/F, and reasoned that it ain't that
> > complicated....let's fix it. Armed with Leon Hellers scheme in the
> > file section I found the problem in 2s flat.....pins 1 and 2 of the
> > jtag connector on the evaluation board were connected together but to
> > nothing else....the '244 on the wriggler had Vcc at 2V courtesy of the
> > protection diodes.
> 
> I'm glad my schematic helped. Was the track from pins 1 and 2 of the
JTAG
> connector actually missing? I find that hard to believe.
> 
> Leon

So did I, I could not see any connections but the board has a black
silkscreen so I stuck the DVM on 2M range and tried to find some
connection to anything. Nothing doing. So I ran a wire to the 3v3 and
everything runs fine.